Dear John Getzke
Thanks for your reply. I did not restore the defaults, but i waited until the black ink was fully empty. After i inserted the new Ink cartridge, my printer is going to standby like before. So the problem seems to have something to do with the warning that the ink in the cartridge is going low.
@ HP Firmware Developer
Please fix that in your next firmware update! thanks :-)
regards
MrSwiss